Furnace.



D. M. JACKSON & J. T. AIKEN.

PURNAGB.

APPLICATION FILED MAY 18, 1908.

Patented Jan. 12, 1909.

W/T/VESSES 0K.

Attorney I THE NORRIS UNITED STATES PATENT OFFICE.

DAVID M. JACKSON AND JOHN T. AIKEN, OF BLOOMINGTON, ILLINOIS.

FURNACE Specification of Letters Patent.

Application filed May 18, 1908.

Patented Jan. 12, 1909.

Serial No. &33,613.

To all whom it may concern:

Be it known that we, DAVID M. JACKSON l 9 threaded or otherwise secured on the ends and JOHN T. AIKEN, citizens of the United States, residing at Bloomington, in the county of McLean and State of Illinois, have invented certain new and useful Improvements in Furnaces, of which the following is a specification.

Our invention relates to improvements in furnaces for melting metal and has for its object the provision of a furnace, in which copper, brass and other metals can be read ily melted without the use of a crucible or other container.

Other objects and advantages of our invention will appear in the course of the following specification.

In the accompanying drawing, Figure 1 is an end elevation, partly in section, of our furnace; and Fig. 2 is a side elevation of the same, partly in section.

Referring to the drawing, which illustrates the preferred form of our invention, 1 designates a metal casing having an open top and an inturned flange 2 around its lower edge or bottom, which flange serves as a support for the fire-brick with which the sides and ends of the furnace are lined.

The bottom of the furnace is adapted to be closed by a door 3 provided on its lower face with a perforated lug 4:, which is adapt ed to fit between a. pair of similarly shaped apertured lugs, 5, 5, attached to or integral with the under side of the flange 2 of the casing 1, and to be held thus assembled by a headed pin 6, which serves as the pivot for the hinge. The door 3 is also supplied with a similar hinge on its opposite side, as shown. The object of this dual hinge arrangement is that the door may be swung down on either hinge as desired, by simply removing the headed pin 6 on the opposite side of the furnace. The upper face of the door 3 has formed thereon an upstanding wall or rib 7 in which are fitted a number of fire brick so arranged as to cover the space defined by said rib.

It will be noted that between the wall or rib 7 and the sides of the furnace is a relatively narrow channel 7 for the reception of fire clay 7 as shown.

The upper opening of the furnace is closed by a door 8 provided with a flange therearound in which are secured several rows of fire-bricks. These bricks are secured in place by tie-rods 9, one passing through each row of brick and secured by means of nuts thereof. The door is provided with a suitable hinge 10 upon which it is designed to be raised to permit the furnace to be charged or for other purposes, by means of an eye 11 secured to the top of the door and a rod 12 adapted to engage with the eye.

In one end of the furnace is an opening 13 closed by a hinged door 14, which is designed to be held in its closed position by means of a suitable catch or other fastening not shown. This door 1 1 is constructed of a metal casing with a flange therearound and within this flange fire brick are secured, as shown. This opening 13 is designed to serve primarily for the introduction of suitable means to remove slag from the metal under treatment.

Above the opening 13 is an aperture 15, through which a burner, preferably of the Bunsen or oXy-hydrogen type, 16 is projected for the purpose of supplying the necessary heat to the furnace. Gases or oil mixed with air under pressure is supplied to the burner through pipes, not shown. While but one opening and one burner are shown it is readily apparent that a plurality of openings and burners may be employed, if desired.

A flue 17 through which the products of combustion escape is so located with respect to the burner as to permit the material under treatment to extract as much of the heat generated by the burner, as possible.

A tap hole 18 is provided near the base of the furnace and is normally closed by a plug of fire clay or like material. The tap hole is so located that the molten metal flowing therethrough will run directly into a trough 19 formed integral with or attached to the casing l of the furnace.

In the foregoing description where reference is made to fire brick, it is to be understood that any similar fire resisting material can be substituted therefor if desired.

While we have shown our furnace mounted on standards 20 it is obvious that it can be portably or otherwise mounted.

The operation of our furnace is as follows: Before charging, the space 7 a between the upstanding wall or rib and the sides and ends of the furnace should be filled with fire clay or like material and the tap hole 18 filled with a plug of like material. The metal to be treated is then placed in the bottom of the furnace and the burner started. The'flame from the burner should be directed downwardly and across the furnace, and maintained until the metal is sufficiently treated. At a convenient time, during the process of treating the metal, the slag door may be opened and the slag removedv When it is time to withdraw the molten metal from the furnace the fire clay closing the tap hole is removed and the metal allowed to flow out through the trough into a suitable ladle or receptacle. The ladle, when not in use, can be kept hot by placing it in line with the fine, through which the products of combustion pass out of the furnace.

When it is desired to clean or reline the furnace, all that is necesary to do is to lift the upper and drop the lower door in order that all parts of the furnace may be readily accessible.

1. A furnace, comprising a casing having an open bottom and a fire resisting lining therein, and a closure for said bottom provided with an upstanding Wall or rib adjacent to the outer edge thereof and adapted to receive a fire resisting lining inside the limits thereof and to form with the outer portion of the closure and the sides of the furnace a relatively narrow channel adapted for the reception of plastic fire resisting material, substantially as described.

2. A furnace, comprising a casing having straight sides and an open top and bottom, a fire resisting lining therein, a closure for said top adapted to receive a fire-resisting lining, and a closure for said bottom provided with an upstanding wall or rib ad-i jacent to the outer edge thereof and adapted to receive a fire resisting lining inside the limits thereof and to form with the outer portion of the closure and the sides of the furnace a relatively narrow channel adapted for the reception of plastic fire resisting material, substantially as described.

In testimony whereof We aflix our signatures in presence of two witnesses.

DAVID M. JACKSON. JOHN T. AIKEN.

Vitnesses CHARLES A. Bownns, JOHN V. CALLAHAN. 

